. . . "Examples of the ester of acrylic acid or methacrylic acid are alkyl esters prepared from acrylic acid or methacrylic acid and an alcohol having an alkyl group of 1 to 14 carbon atoms, such as methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, n-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, 1-methyl-1-pentanol, 2-methyl-1-pentanol, 3-methyl-1-pentanol, 2-" .